PRINTHEAD INCLUDING CHANNELS MADE FROM PHOTOIMAGEABLE MATERIALS

摘要

A method of forming ink channels (45) upon a substrate (14) having actuators has a first layer (44) of uncured photoresist material of a first type deposited onto the substrate. The first type of photoresist material is exposed to form cured and uncured areas wherein the uncured areas comprise the ink channels with orifices (40) from which ink is to be ejected. A second layer (46) of photoresist material of a second type is deposited over the cured and uncured areas of the first type of photoresist material and then exposed to provide uncured areas representing the orifices (41) from which the ink is to be ejected and cured areas comprising channel walls for the ink channels. The second layer is developed with a first developer suitable for developing the second layer but not suitable for developing the first layer. The first layer is developed with a second developer suitable for developing the first layer but not suitable for developing the second layer. The undeveloped material in the first layer is removed to form the ink channels with orifices.